Self-Diagnostic System
Body Control Module (BCM) is equipped with a self-diagnostic system, which detects system Diagnostic Trouble Codes (DTCs) or abnormalities. When a malfunction occurs, BCM will store a DTC. See BCM DTC DEFINITIONS . Malfunctions are recorded as history/intermittent failures or as current failures. Current DTCs indicate BCM has detected a fault which is currently present. A history DTC indicates that BCM has previously detected a malfunction that is not currently present.
A scan tool can be used to retrieve and clear DTCs. The scan tool also has several features that can be used to help locate an intermittent condition. When scan tool is used for system tests, it will display values actually seen or commanded by various systems (i.e., BCM, PCM). This will usually include the following types of information:
- Analog Data Input
Displays analog input seen by system. - Inputs/Outputs
Displays digital values as seen by system, and provides indication of whether input or output has cycled. - Special Functions (Output Controls)
Allows for outputs of system to be set at a desired value (ON or OFF). This will only indicate if BCM is sending the appropriate commands, not what action was actually taken. - Clear Codes
Will erase DTCs for system currently selected (if problem still exists in system, DTC may immediately reset).
| DTC(1) | Description | ||
|---|---|---|---|
| B0608 | BCM Power Moding Error | ||
| B1003 | RFA Programming/Diagnostic Mode Message Not Received | ||
| B1007 | BCM Internal Memory Malfunction (Write Error) | ||
| B1009 | BCM Internal Memory Malfunction (Checksum Error) | ||
| B1015 | VIN Information Error | ||
| B1339 | Battery For Door Lock Circuit (Open) | ||
| B1344 | Courtesy Lights Battery Feed Circuit (Open) | ||
| B1349 | Door Lock Actuator Ground Feed Circuit (Open) | ||
| B1477 | RAP Relay Circuit (Short To Ground Or Open) | ||
| B1478 | RAP Relay Circuit (Short To Voltage) | ||
| B1482 | Courtesy Lights Circuit (Short To Ground) | ||
| B2533 | Foglight Switch Circuit (Short To Voltage) | ||
| B2552 | Backup Lamp Circuit Low | ||
| B2553 | Backup Lamp Circuit High | ||
| B2559 | Theater Dimming Ground Circuit (Open) | ||
| B2602 | DRL Control Module Circuit (Short To Ground Or Open) | ||
| B2603 | DRL Control Module Circuit (Short To Voltage) | ||
| B2612 | Passenger Compartment Dimming No. 1 Circuit Low | ||
| B2613 | Dim Potentiometer Circuit High | ||
| B2618 | Passenger Compartment Dimming No. 2 Circuit High | ||
| B2747 | Performance Shift Switch Circuit (Short To Ground Or Open) | ||
| B2753 | Horn Relay Circuit (Short To Voltage) | ||
| B2818 | Low Tire Pressure System Reset Circuit Low | ||
| B2957 | PASS-Key(R) II Detection Circuit (Short To Ground) | ||
| B2958 | PASS-Key(R) II Detection Circuit (Short To Voltage Or Open) | ||
| B2960 | PASS-Key(R) II Detection Circuit (Out Of Range) | ||
| B2961 | Key-In-Ignition Fault | ||
| B3102 | RFA Link Circuit (Short To Ground) | ||
| B3103 | RFA Link Circuit (Short To Voltage) | ||
| B3106 | RFA Link Parity Error | ||
| B3127 | Driver's Door Unlock Circuit (Short To Ground Or Open) | ||
| B3128 | Driver's Door Unlock Circuit (Short To Voltage) | ||
| B3031 | PASS-Key(R) II Programming Mode Active | ||
| B3267 | Decklid Output Relay (Short To Ground Or Open) | ||
| B3268 | Decklid Output Relay (Short To Voltage) | ||
| U1016 | Loss Of Class 2 Communication With PCM | ||
| U1040 | Loss Of Class 2 Communication With ABS | ||
| U1096 | Loss Of Class 2 Communication With IPC | ||
| U1255 | Loss Of Class 2 Serial Data Fault (General) | ||
| U1300 | Class 2 Circuit (Short To Ground) | ||
| U1301 | Class 2 Circuit (Short To Voltage) | ||
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